Wheel Speed Sensors; Brake Switch Input - Dodge 1997 Neon WIRING DIAGRAMS Owner's Manual

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DESCRIPTION AND OPERATION (Continued)

WHEEL SPEED SENSORS

There are four wheel speed sensors, one at each
wheel. The sensors use a tone wheel to determine
wheel speed. Input to the Controller Anti Lock Brake
(CAB) is done on the following circuits. All of these
circuits are a twisted pair.
B8 and B9 for the left front wheel (cavity 8 and
cavity 9).
B6 and B7 for the right front wheel (cavity 6 and
cavity 7).
B3 and B4 for the left rear wheel (cavity 3 and cav-
ity 4).
B1 and B2 for the right rear wheel (cavity 1 and
cavity 2).

BRAKE SWITCH INPUT

Circuit L50 is an input to the Controller Anti Lock
Brake (CAB). The L50 connects to cavity 13 of the
CAB connector. Circuit L50 is spliced in with the
stop lamps and is used to provide the CAB with
information on when the brakes are being applied.
DATA LINK CONNECTOR
Circuit D21 is used for diagnostics of a fault with
the ABS system. It is spliced in with the Powertrain
Control Module (PCM) circuits and used as an output
from the Controller Anti Lock Brake (CAB). Circuit
D21 connects to cavity 51 of the CAB connector.
HELPFUL INFORMATION
• Check the 15 amp fuse located in cavity 10 of
the fuse block.
• Check the 40 amp fuse located in the PDC.
• Check for a good ground at the left headlamp
ground.
• Check the case ground on the CAB
• Refer to the appropriate section of the service
manual, or the Diagnostic Test Procedures Manual.
8W - 35 ANTI-LOCK BRAKES 8W - 35 - 7